Agilent Technologies N9010A - Manual (Page 96)

96 Chapter 4
Option B25 - 25 MHz Analysis Bandwidth
Other Analysis Bandwidth Specifications
Description Specifications Supplemental Information
IF Frequency Response
a
Modes above 18 GHz
b
(Demodulation and FFT
response relative to the
center frequency)
Center Freq
(GHz) Span
c
(MHz) Preselector
Max Error
d
(Exceptions
e
)
20 to 30
°C Full range
Midwidth
Error
(95th
Percentile)
Slope
(dB/MHz)
(95th
Percentile)
RMS
f
(nominal)
≤3.6
10 to
≤25 n/a ±0.45 dB ±0.45 dB ±0.12 dB ±0.10
0.051 dB
>3.6 10 to
≤25 g
On 0.45 dB
>3.6 10 to
≤25 h
Off
h ±0.45 dB ±0.80 dB ±0.12 dB ±0.10
0.071 dB
a. The IF frequency response includes effects due to RF circuits such as input filters, that are a function of
RF frequency, in addition to the IF passband effects.
b. Signal frequencies between 18 and 26.5 GHz are prone to additional response errors due to modes in the
Type-N connector used with frequency Option 526. With the use of Type-N to APC 3.5 mm adapter part
number 1250-1744, there are nominally six such modes. These modes cause nominally up to
−0.35 dB
amplitude change, with phase errors of nominally up to
±1.2 ° .
c. This column applies to the instantaneous analysis bandwidth in use. In the Spectrum analyzer Mode,
this would be the FFT width.
d. The maximum error at an offset (f) from the center of the FFT width is given by the expression
± [Mid-
width Error + (f
× Slope)], but never exceeds ±Max Error. Here the Midwidth Error is the error at the
center frequency for the given FFT span. Usually, the span is no larger than the FFT width in which case
the center of the FFT width is the center frequency of the analyzer. In the Spectrum Analyzer mode,
when the analyzer span is wider than the FFT width, the span is made up of multiple concatenated FFT
results, and thus has multiple centers of FFT widths so the f in the equation is the offset from the nearest
center. These specifications include the effect of RF frequency response as well as IF frequency
response at the worst case center frequency. Performance is nominally three times better at most center
frequencies.
e. The specification does not apply for frequencies greater than 3.6 MHz from the center in FFT widths of
7.2 to 8 MHz.
f. The “RMS” nominal performance is the standard deviation of the response relative to the center fre-
quency, integrated across the span. This performance measure was observed at a center frequency in
each harmonic mixing band, which is representative of all center frequencies; it is not the worst case
frequency.
g. For information on the preselector which affects the passband for frequencies above 3.6 GHz when
Option MPB is not in use, see “Preselector Bandwidth” on page 31 .
h. Option MPB is installed and enabled.